1.建立匹配表
//建立一个文件类型与文件后缀名的匹配表 private static final String[][] MATCH_ARRAY={ //{后缀名, 文件类型} {".3gp", "video/3gpp"}, {".apk", "application/vnd.android.package-archive"}, {".asf", "video/x-ms-asf"}, {".avi", "video/x-msvideo"}, {".bin", "application/octet-stream"}, {".bmp", "image/bmp"}, {".c", "text/plain"}, {".class", "application/octet-stream"}, {".conf", "text/plain"}, {".cpp", "text/plain"}, {".doc", "application/msword"}, {".exe", "application/octet-stream"}, {".gif", "image/gif"}, {".gtar", "application/x-gtar"}, {".gz", "application/x-gzip"}, {".h", "text/plain"}, {".htm", "text/html"}, {".html", "text/html"}, {".jar", "application/java-archive"}, {".java", "text/plain"}, {".jpeg", "image/jpeg"}, {".jpg", "image/jpeg"}, {".js", "application/x-javascript"}, {".log", "text/plain"}, {".m3u", "audio/x-mpegurl"}, {".m4a", "audio/mp4a-latm"}, {".m4b", "audio/mp4a-latm"}, {".m4p", "audio/mp4a-latm"}, {".m4u", "video/vnd.mpegurl"}, {".m4v", "video/x-m4v"}, {".mov", "video/quicktime"}, {".mp2", "audio/x-mpeg"}, {".mp3", "audio/x-mpeg"}, {".mp4", "video/mp4"}, {".mpc", "application/vnd.mpohun.certificate"}, {".mpe", "video/mpeg"}, {".mpeg", "video/mpeg"}, {".mpg", "video/mpeg"}, {".mpg4", "video/mp4"}, {".mpga", "audio/mpeg"}, {".msg", "application/vnd.ms-outlook"}, {".ogg", "audio/ogg"}, {".pdf", "application/pdf"}, {".png", "image/png"}, {".pps", "application/vnd.ms-powerpoint"}, {".ppt", "application/vnd.ms-powerpoint"}, {".prop", "text/plain"}, {".rar", "application/x-rar-compressed"}, {".rc", "text/plain"}, {".rmvb", "audio/x-pn-realaudio"}, {".rtf", "application/rtf"}, {".sh", "text/plain"}, {".tar", "application/x-tar"}, {".tgz", "application/x-compressed"}, {".txt", "text/plain"}, {".wav", "audio/x-wav"}, {".wma", "audio/x-ms-wma"}, {".wmv", "audio/x-ms-wmv"}, {".wps", "application/vnd.ms-works"}, {".xml", "text/plain"}, {".z", "application/x-compress"}, {".zip", "application/zip"}, {"", "*/*"} };
2.根据路径打开文件
/** * 根据路径打开文件 * @param context 上下文 * @param path 文件路径 */ public static void openFileByPath(Context context,String path) { if(context==null||path==null) return; Intent intent = new Intent(); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); //设置intent的Action属性 intent.setAction(Intent.ACTION_VIEW); //文件的类型 String type = ""; for(int i =0;i<MATCH_ARRAY.length;i++){ //判断文件的格式 if(path.toString().contains(MATCH_ARRAY[i][0].toString())){ type = MATCH_ARRAY[i][1]; break; } } try { //设置intent的data和Type属性 intent.setDataAndType(Uri.fromFile(new File(path)), type); //跳转 context.startActivity(intent); } catch (Exception e) { //当系统没有携带文件打开软件,提示 ShowToastUtil.showToast(context,"无法打开该格式文件!"); e.printStackTrace(); } }
3.结果
①当系统打不开该格式文件
②当系统应用可以打开文件
注:下载的文件是一个PDF格式的文件